<template>
  <div class='home-category' @mouseleave="currentId=null">
    <ul class="menu">
      <!--  商品数据列表 -->
      <li :class="{active:currentId === item.id}"  @mouseenter="currentId=item.id" v-for="item in $store.getters['cate/leftCate']" :key="item.id">
        <RouterLink to="/">{{item.name}}</RouterLink>
     <template v-if="item.children">
   <RouterLink v-for='cate in item.children' :key='cate.id' to="/">{{cate.name}}</RouterLink>
     </template>
     <!--  数据比较慢的情况下先展示骨架 -->
     <template v-else>
 <XtxSkeleton width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
  <XtxSkeleton width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
     </template>
      </li>
      <!-- 品牌数据哈 -->
      <li  @mouseenter="currentId=barnd.id" :class="{active:currentId=== 'barnd'}">
      <RouterLink to="/">{{barnd.name}}</RouterLink>
      <RouterLink  to="/">{{barnd.children[0].name}}</RouterLink>
      </li>
    </ul>
    <!-- 弹层 -->
<div class="layer">
  <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
 <!-- 商品数据分析哈 -->
  <ul>
    <li v-for=" obj in goods" :key="obj.id">
      <RouterLink to="/">
        <img :src="obj.picture" alt="">
        <div class="info">
        <p class="name ellipsis-2">{{obj.name}}</p>
          <p class="desc ellipsis">{{obj.desc}}</p>
        <p class="price"><i>¥</i>{{obj.price}}</p>
        </div>
      </RouterLink>
    </li>
  </ul>
  <!-- 品牌数据弹出层 -->
<ul v-if="barnd.id === currentId">
  <li class="brand" v-for="obj in barnd.barnds" :key="obj.id">
    <RouterLink to="/">
      <img :src="obj.picture" alt="">
      <div class="info">
        <p class="place"><i class="iconfont icon-dingwei"></i>{{obj.place}}</p>
        <p class="name ellipsis">{{obj. nameFn}}</p>
        <p class="desc ellipsis-2">{{obj.name}}</p>
      </div>
    </RouterLink>
  </li>
</ul>
</div>
  </div>
</template>

<script>
import { useStore } from 'vuex'
import { ref, computed, reactive } from 'vue'
import { findBrand } from '@/api/home'
export default {
  name: 'HomeCategory',
  setup () {
    const store = useStore()
    const currentId = ref(null) // 记录当前访问左侧栏的显示
    // 模拟品牌数据哈
    const barnd = reactive({
      id: 'barnd',
      name: '品牌',
      children: [{ id: 'barnd-children', name: '品牌推介' }],
      barnds: []
    })
    //  直接调用接口拿取品牌列表数据
    findBrand().then((res) => {
      if (res.result) { // 有数据就往下走
        barnd.barnds = res.result
      }
    })
    const goods = computed(() => { // 使用ref记录当前鼠标进入那个数据对象的id 配合计算属性来计算出当前对象中的所有保存的数据
      const cate = store.state.cate.list.find(item => item.id === currentId.value)
      return cate ? cate.goods : []
    })
    return { currentId, goods, barnd }
  }
}
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0,0,0,0.8);
  position: relative;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &.active { // 直接是全部覆盖所有的li嘛
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  .layer {
  width: 990px;
  height: 500px;
  background: rgba(255,255,255,0.8);
  position: absolute;
  left: 250px;
  top: 0;
  display: none;
  padding: 0 15px;
  h4 {
    font-size: 20px;
    font-weight: normal;
    line-height: 80px;
    small {
      font-size: 16px;
      color: #666;
    }
  }
  ul {
    display: flex;
    flex-wrap: wrap;
    li {
      width: 310px;
      height: 120px;
      margin-right: 15px;
      margin-bottom: 15px;
      border: 1px solid #eee;
      border-radius: 4px;
      background: #fff;
      &:nth-child(3n) {
        margin-right: 0;
      }
      a {
        display: flex;
        width: 100%;
        height: 100%;
        align-items: center;
        padding: 10px;
        &:hover {
          background: #e3f9f4;
        }
        img {
            width: 95px;
            height: 95px;
        }
        .info {
          padding-left: 10px;
          line-height: 24px;
          width: 190px;
          .name {
            font-size: 16px;
            color: #666;
          }
          .desc {
            color: #999;
          }
          .price {
            font-size: 22px;
            color: @priceColor;
            i {
              font-size: 16px;
            }
          }
        }
      }
    }
    li.brand {
  height: 180px;
  a {
    align-items: flex-start;
    img {
      width: 120px;
      height: 160px;
    }
    .info {
      p {
        margin-top: 8px;
      }
      .place {
        color: #999;
      }
    }
  }
}
  }
}
&:hover {
  .layer {
    display: block;
  }
}
//  覆盖原有骨架上面的动画
.xtx-skeleton {
  animation: fade 0.5s  linear infinite alternate;
}
@keyframes fade {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}
}
</style>
